Example Code for Arduino-OTAA Network Access

Hardware Preparation

• DFR0994 Romeo ESP32-S3 x 1
• LoRaWAN Indoor Gateway (868MHz Version) or LoRaWAN Indoor Gateway (915MHz Version) x1

Software Preparation

• Download Arduino IDE: Click to download Arduino IDE
• Add ESP32 board to Arduino IDE
• Please install the DFRobot_LoRaWAN_ESP32S3 library before use.
• About how to install the library?

Note:

• LoRaWAN protocol stack version: 1.0.3
• You need to set the data parsing format to "text" on the gateway.

Sample Code

#include "DFRobot_LoRaWAN.h"

// Data packet transmission interval
#define APP_INTERVAL_MS 10000

const uint8_t DevEUI[8] = {0xDF, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11};
const uint8_t AppEUI[8] = {0xDF, 0xB7, 0xB7, 0xB7, 0xB7, 0x00, 0x00, 0x00};
const uint8_t AppKey[16] = {
    0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 
    0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10};
uint8_t port = 2;

uint8_t buffer[255];
LoRaWAN_Node node(DevEUI, AppEUI, AppKey, CLASS_A);
TimerEvent_t appTimer;

void joinCb(bool isOk, int16_t rssi, int8_t snr)
{
    if(isOk){
        printf("JOIN SUCCESS\n");
        TimerSetValue(&appTimer, APP_INTERVAL_MS);
        TimerStart(&appTimer);
    }else{
        printf("OTAA connection error. Restart the connection request packet after 5 seconds.\n");
        delay(5000);
        node.join(joinCb);      // Rejoin the LoRaWAN network        
    }
}

void userSendUnConfirmedPacket(void)
{
    TimerSetValue(&appTimer, APP_INTERVAL_MS);
    TimerStart(&appTimer);    

    const char * data = "DFRobot"; 
    uint32_t datalen = strlen(data);
    memcpy(buffer, data, datalen);
    node.sendUnconfirmedPacket(port, buffer, /*size=*/datalen);

    printf("Sending Unconfirmed Packet...\n");
}

// Receive data callback function
void rxCb(void *buffer, uint16_t size, uint8_t port, int16_t rssi, int8_t snr, bool ackReceived, uint16_t uplinkCounter, uint16_t downlinkCounter)
{
    if(size != 0){
        printf("data:%s\n", (uint8_t*)buffer);
    }
}

void setup()
{
    Serial.begin(115200);
    delay(5000); // Open the serial port within 5 seconds after uploading to view full print output
     
    if(!(node.init(/*dataRate=*/DR_4, /*txEirp=*/16))){     // Initialize the LoRaWAN node, set the data rate and Tx Eirp
        printf("LoRaWAN Init Failed!\nPlease Check: DR or Region\n");
        while(1);
    }
    TimerInit(&appTimer, userSendUnConfirmedPacket); // Initialize timer event
    node.setRxCB(rxCb);                            // Set the callback function for receiving data
    node.join(joinCb);                             // Join the LoRaWAN network
    printf("Join Request Packet\n");
}

void loop()
{
    delay(1000);
}

Result